/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 14 A card is drawn out of a standar... [FREE SOLUTION] | 91Ó°ÊÓ

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A card is drawn out of a standard deck of 52 cards. Each card can be described by giving its "value" \((A, 2,3,4, \ldots,\) \(10, J, Q, K)\) and its "suit" ( \(H\) for hearts, \(C\) for clubs, \(D\) for diamonds, and \(S\) for spades). For example, \(2 D\) denotes the two of diamonds and \(J H\) denotes the jack of hearts. Write out the event described by cach of the following statements as a set. (a) \(E_{1}:\) "draw a queen." (b) \(E_{2}:\) "draw a heart." (c) \(E_{3}:\) "draw a face card." (A "face" card is a jack, queen, or king.)

Short Answer

Expert verified
The set for event \(E_{1^{*}}\) is \(E_{1^{*}}=\{QH,QC,QD,QS\}\), the set for event \(E_{2}\) is \(E_{2}=\{AH,2H,3H,4H,5H,6H,7H,8H,9H,10H,JH,QH,KH\}\), and the set for event \(E_{3}\) is \(E_{3}=\{JH,JC,JD,JS,QH,QC,QD,QS,KH,KC,KD,KS\}\).

Step by step solution

01

Identify the cards for event \(E_{1^{*}}\)

The event \(E_{1^{*}}\) is defined as drawing a queen. This event can occur if any of the four queens in the deck are drawn i.e., \(QH\), \(QC\), \(QD\), \(QS\). So, the event \(E_{1^{*}}\) can be written as a set \(E_{1^{*}}=\{QH,QC,QD,QS\}\).
02

Identify the cards for event \(E_{2}\)

The event \(E_{2}\) is defined as drawing a heart. This can happen if any card of hearts is drawn. There are 13 cards of hearts in the deck i.e., \(AH, 2H, 3H, 4H, 5H, 6H, 7H, 8H, 9H, 10H, JH, QH, KH\). So, the event \(E_{2}\) can be written as the set \(E_{2}=\{AH,2H,3H,4H,5H,6H,7H,8H,9H,10H,JH,QH,KH\}\).
03

Identify the cards for event \(E_{3}\)

The event \(E_{3}\) is defined as drawing a face card. The face cards are jacks, queens, and kings, and there are 4 of each in the deck i.e., \(JH, JC, JD, JS, QH, QC, QD, QS, KH, KC, KD, KS\). So, the event \(E_{3}\) can be written as the set \(E_{3}=\{JH,JC,JD,JS,QH,QC,QD,QS,KH,KC,KD,KS\}\).

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Event Probability
In the intriguing world of card games, understanding event probability is crucial. When we talk about an 'event' in probability, we mean any specific outcome or a set of outcomes. For instance, drawing a queen from a deck of cards is an event.

Probability helps us to quantitatively evaluate how likely an event is to happen based on all possible outcomes. The probability of drawing a queen from a standard deck of 52 cards is calculated by dividing the number of favorable outcomes (drawing one of the four queens) by the total number of possible outcomes (52 cards in total). Therefore, the probability is \[P(\text{{Queen}}) = \frac{4}{52} = \frac{1}{13}.\]
  • Favorable outcomes: Events that satisfy the condition (e.g., a card being a queen).
  • Total possible outcomes: All events that can possibly happen (e.g., any card being drawn).
Understanding these concepts is vital to making informed predictions in card games and other real-life scenarios where probability can influence decision-making.
Set Notation
Set notation is a convenient way to systematically list all possible outcomes of an event. In probability, it helps describe events in a clear and structured form. A "set" is simply a collection of distinct objects, considered as an object in its own right.

For example, when we described the event of drawing a queen (\(E_{1^{*}}\)), we used set notation to clearly list all the queens that can be drawn: \(E_{1^{*}} = \{ QH, QC, QD, QS \}.\)
  • Set elements: Each member or item within a set (e.g., individual queens).
  • Curly brackets: Used to denote a set (e.g., \(\{\} \)).
Using sets makes it straightforward to see all possible cards that satisfy the condition of the event, making complex problems easier to understand and solve. This is particularly helpful in games where probability is calculated over different sets of cards.
Playing Cards
Playing cards are a universal tool for games, with each deck containing 52 cards. Each card has a value (Ace through King) and belongs to one of four suits: Hearts, Clubs, Diamonds, and Spades. This design creates a wide array of possibilities, making card games both exciting and challenging.

  • Values: \(A, 2, 3, 4, \ldots, 10, J, Q, K\)
  • Suits: Hearts (\(H\)), Clubs (\(C\)), Diamonds (\(D\)), Spades (\(S\))
When approaching a card game scenario, it's important to visualize the entire deck and comprehend the attributes of the card you draw. Each card's unique value and suit make card games a dynamic way to study probability and strategy. With the right strategies, you can predict or influence the outcome of a game based on which cards are left in the deck.
Math in Card Games
Math plays a pivotal role in understanding card games. It involves calculating probabilities, understanding sequences, and strategically planning to maximize your chances of winning.

By applying mathematical concepts such as permutations and combinations, you can determine the likelihood of various hands and events.
  • Permutations: Arrangements of a set where order matters (e.g., the sequence in poker).
  • Combinations: Ways of selecting items from a set where order doesn't matter (e.g., drawing pairs or sets in various games).
Mathematics allows players to go beyond guesswork, applying logical and methodical approaches to make strategic decisions. Whether you're dealing with probability scenarios like drawing a face card or trying to predict an opponent's move, math is the backbone of informed and tactical decision-making in card games.

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Most popular questions from this chapter

Using set notation, write out the sample space for each of the following random experiments. (a) A coin is tossed four times in a row. The observation is how the coin lands ( \(H\) or \(T\) ) on each toss. (b) A student randomly guesses the answers to a fourquestion true-or-false quiz. The observation is the student's answer ( \(T\) or \(F\) ) for each question. (c) A coin is tossed four times in a row. The observation is the percentage of tosses that are heads. (d) A student randomly guesses the answers to a fourquestion true-or-false quiz. The observation is the percentage of correct answers in the test.

Using set notation, write out the sample space for each of the following random experiments: (a) Roll three dice. The observation is the total of the three numbers rolled. (b) Toss a coin five times. The observation is the difference (# of heads-# of tails) in the five tosses.

Five candidates \((A, B, C, D,\) and \(E)\) have a chance to be selected to be on American Idol. Any subset of them (including none of them or all of them) can be selected. The observation is which subset of individuals is selected. Write out the event described by each of the following statements as a set. (a) \(E_{1}:\) "two candidates get selected." (b) \(E_{2}:\) "three candidates get selected." (c) \(E_{3}:\) "three candidates get selected, and \(A\) is not one of them."

Seven horses \((A, B, C, D, E, F,\) and \(G)\) are running in the Boonsville Sweepstakes. According to the oddsmakers, \(A\) has a "one in four" probability of winning [i.e., \(\operatorname{Pr}(A)=1 / 4]\), \(B\) has a "three in ten" probability of winning, and \(C\) has a "one in twenty" probability of winning. The remaining four horses all have the same probability of winning. Find the probability assignment for the probability space.

In head-to-head, 7 -card stud poker you make your hand by selecting your 5 best cards from the 2 in your hand and 3 from the 5 common cards showing on the table (the "flush draw") \(-\) if the last card ("river" card) is a spade you will have an ace high flush and a guaranteed win. Assume that your opponent has a decent hand and if you don't get the spade on the river card you will lose the hand. (a) Suppose there is \(\$ 100\) in the pot and your opponent moves "all-in" with a \(\$ 50\) bet. Should you call the bet or fold? Explain. (b) Suppose there is \(\$ 100\) in the pot and your opponent moves "all-in" with a \(\$ 20\) bet. Should you call the bet or fold? Explain.

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